基于模态试验的连接结构状态表征参数研究

肖世富;刘信恩; 杜强

振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 60-63.

PDF(819 KB)
PDF(819 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 60-63.
论文

基于模态试验的连接结构状态表征参数研究

  • 肖世富; 刘信恩; 杜强
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Study on Modal-Experiment-Based Indication Parameter of Structural Bolted State 

  • Xiao Shi-;Liu Xin-en; Du Qiang
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摘要


摘要:有效辨识螺栓连接结构的连接状态,是确保结构可靠性和安全性的基础。传统的基于模态参数辨识结构连接状态变化的方法效果不太理想,本文从模态理论出发,在基准模态空间中构造了相对模态复/实连接刚度两类特征参数表征结构的连接状态,并采用不同拧紧力矩下的螺栓连接梁模态试验对构造的表征参数的有效性进行了检验。结果表明,本文构造的表征参数比固有频率对连接状态变化具有更好的敏感性。


Abstract

Abstract: Effectual identification of the structural bolted state is the base to inure the structural reliability and safety. Generally, the traditional identification methods based on modal parameter are not so ideal. At present work, plural and real indication parameters, which present relatively modal connection stiffness, are constructed in the modal space to indicate the structural bolted state. The efficiency of the indication parameters are tested by modal experiments of the bolted beam with different bolted moments. The results show that the indication parameters are more sensitive to the structural bolted state than the nature frequencies.

关键词

连接状态辨识 / 模态试验 / 相对模态连接刚度 / 放大系数

Key words

Identification of structural bolted state / modal experiment / relatively modal connection stiffness / magnification coefficient

引用本文

导出引用
肖世富;刘信恩; 杜强. 基于模态试验的连接结构状态表征参数研究[J]. 振动与冲击, 2011, 30(4): 60-63
Xiao Shi-;Liu Xin-en;Du Qiang. Study on Modal-Experiment-Based Indication Parameter of Structural Bolted State [J]. Journal of Vibration and Shock, 2011, 30(4): 60-63

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